When one mom bought her darling son this festive Christmas sweater, it almost landed her on the naughty list. Although at first glance, the garment seems innocent, if you look a little closer, you'll see why she was so embarrassed.

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It appears old Saint Nick couldn't "hold it in" after too many Jingle Jangle Punches and had to relieve himself mid-shirt.

Reddit user angryhamzter shared the picture, with the caption: "Accidentally sent my son to school wearing his newly bought sweater. Didn't realize what Santa was doing until his kindergarten teacher pointed it out to me when I picked him up."

The picture — which has gone viral, because at Christmastime, we're all children at heart — has garnered quite a few amusing comments. Our favorite? "You can't wear that when urine school."

Now, only one question remains. Why would they make this cheeky sweater in a child size?